| Subject | English | Chinese |
| IT | ADSL transceiver unit, central office end | ADSL 局端收发单元 |
| el. | asymmetric digital subscriber line central office | 非对称数字用户线中央［心］局 |
| UN, afr. | BINUCA Integrated United Nations Peacebuilding Office in the Central African Republic | 联合国中非共和国建设和平综合办事处中非建和办 |
| earth.sc. | British Central Scientific Office | 英国中央科技局 |
| gen. | British Central Scientific Office | 英国中央科学局 |
| agric. | centerx central office | 集中交换式中心局 |
| gen. | Central Air Document Office | 中央航空文献处美 |
| avia. | central coding office | 中央编码室 |
| space | Central Control Office | 中央控制办公室 |
| space | Central Control Office | 中央控制处 |
| earth.sc. | Central Coordination and Referral Office NODC | 中央协调指导局美国国家海洋数据中心 |
| el. | central dial office | 中央自动电话局 |
| oil | central dispatch office | 中央调度室 |
| oil | central dispatch office | 中心调度室 |
| gen. | Central Distribution Office | 中央分配局 |
| oil, transp. | Central Europe Pipeline Office | 中欧输油管道局 |
| tech. | central forecasting office | 预报中 |
| earth.sc. | central meteorological office | 中央气象局 |
| telecom., amer. | central office | 市话局 (CO) |
| tech. | central office | 中央电话局 |
| agric. | central office | CO中心电话局 |
| el. | central office | 中央局 |
| IT | central office | 总机 |
| IT | central office | 中心局 |
| el. | central office | 总局 |
| proj.manag. | central office | 通信交换中心 |
| avia. | central office | 中央办公室 |
| econ. | central office | 总部 |
| manag. | central office | 中央营业所 |
| telecom., amer. | central office | 中心局 (CO) |
| telecom. | central office | 市话局 |
| telecom. | central office | 电话交换局 |
| telecom. | central office | 本地局 |
| IT | central office | 中心站 |
| multimed. | central office | 电话总局 |
| commun., railw. | central office cable | 局用电缆 |
| el. | central office code | 中心局代码 |
| telecom., amer. | central office code | 市话局局号 |
| IT | central office connecting facility | 交换局连接设施 |
| el. | central office connection | 中心局连接 |
| busin. | central office engineering | 总公司工程 |
| el. | central office equipment | 中心局设备 |
| telecom., amer. | central office equipment | 市话交换局设备 |
| agric. | central office exchange | 中心局交换台 (CO exchange) |
| telecom., amer. | central office exchange | 局用交换机 |
| tech. | central office exchange | 中心交换局 |
| IT | central office exchange service | 中心局交换业务 |
| UN, polit. | Central Office for International Carriage by Rail | 国际铁路运输总办事处 |
| el. | central office interface | 中心局接口 |
| el. | central office interface unit | 中心局接口单元 |
| tech. | central office line | 用户线 |
| el. | central office line unit | 中心局线路单元 |
| IT | central office local area network | 中心局局域网 |
| AI. | Central Office Maintenance Printout Analysis and Suggestion System | COMPASS 专家系统用于分析电话交换系统维护信息并提出维护建议 |
| cryptogr. | central office of record | 中央档案处 |
| cryptogr. | central office of record | 通信安全记录中央办公室 |
| IT | central office terminal | 局端机 |
| el. | central office terminal | 中心局终端 |
| telecom. | central office termination | 局端 |
| el. | central office trunk | 总局干线 |
| IT | central office trunk | 交换局中继线 |
| el. | central office trunk | 中心局干线 |
| telecom., amer. | central office unit | 市话局单元通常以万门为一单元 |
| el. | central radio office | 中央无线电室 |
| brit., busin. | Central Statistical Office | 中央统计处局 |
| stat. | central statistical office | 中央统计局 |
| econ. | central statistical office | 英国中央统计局 |
| earth.sc. | central statistical office | 中央统计局英 |
| tech. | Central Telecommunication Office | 中央电信局 |
| gen. | Central Telegraph Office | 电报总局 |
| el. | Central telegraph Office | 中央电报局 |
| met. | central telephone office | 中央电话总局 |
| commun., railw. | central telephone office | 中心电话所 |
| tech. | central telephone office | 电话中心局 |
| tech. | common battery central office | 共电制电话总局亠 |
| tech. | common battery central office | 公用电源供电局 |
| tech. | common battery central office | 公用电源中心站 |
| telecom. | decentralizing the central office | 交换局分散化 |
| telecom. | decentralizing the central office | 中心局分散化 |
| tech. | dial central office | 自动电话总局 |
| el. | digital central office | 数字通信总局 |
| el. | distant central office transceiver | 远距离通信总局收发机 |
| IT | electronic central office | 电子电话中心局 |
| tech. | electronic central office | 电子中心局 |
| geol. | Hungarian Central Office of Geology | 匈牙利地质总局 |
| tech. | local central office | 分局 |
| tech. | local central office | 市内中继线路 |
| telecom., amer. | local central office | 市内交换局 |
| telecom., amer. | local central office | 本地中心局 (CCHT 不赞成用此名词) |
| IT | local central office | 地区中心局 |
| telecom., amer. | local central office | 市话局 |
| tech. | local central office | 本地中心局 |
| tech. | local central office | 本地电话局 |
| tech. | local central office | 市内中心局 |
| telecom., amer. | manual central office | 人工电话局 |
| tech. | manual central office | 人工电话局 |
| el. | manual telephone central office | 人工电话总局 |
| comp.name. | OCTI Central Office for International Railway Transport | 国际铁路运输中心办公室 |
| UN, account. | Office of Central Support Services | 中央支助事务厅 |
| UN | office of for central support services | 中央支助事务厅 |
| UN | Peace-building support office in Central African Republic | 中非支助处 |
| textile | Post Central Office | 邮政总局 |
| China, polit. | proposals of the removal from office of a member of the Standing Committee of the National People's Congress, the President or Vice-President of the Peopled Republic of China, a member of the State Council or the Central Military Commission, the President of the Supreme Peopled Court or the Procurator-General of the Supreme People's Procuratorate | 对于全国人民代表大会常务委员会的组成人员，中华人民共和国主席、副主席，国务院和中央军事委员会的组成人员，最高人民法院院长和最高人民检察院检察长的罢免案 |
| tech. | radio central office | 无线电总局 |
| telecom. | radio central office | 无线电中央室 |
| tech. | radio central office | 无线电中央台 |
| org.name. | Regional Office for Europe and Central Asia | 欧洲及中亚区域办事处 |
| earth.sc. | Regional Office for Science and Technology in South and Central Asia | 南亚和中亚区域科学技术局联合国教科文组织，印度 |
| nautic., tech. | Russian Federation Security Central Office | 俄联邦#全总局 |
| telecom. | self-contained central office | 设备齐全的交换局 |
| telecom. | self-contained central office | 独立装备的交换局 |
| org.name. | Subregional Office for Central Africa | 中部非洲分区域办事处利伯维尔 |
| org.name. | Subregional Office for Central America | 中美洲分区域办事处 |
| org.name. | Subregional Office for Central and Eastern Europe | 中欧及东欧分区域办事处 |
| org.name. | Subregional Office for Central Asia | 中亚分区域办事处 |
| el. | tactical automatic telephone central office | 战术自动电话中心局 |
| telecom., amer. | tandem central office | 转接局 |
| telecom., amer. | tandem central office | 汇接局 |
| IT | telenet central office | 电信网中心局 |
| IT | telenet central office,class | II 二类电信网中心局 (class II TCO) |
| IT | telenet central office, class | III 三类电信网中心局 (class III TCO) |
| IT | telenet central office, class | IV 四类电信网中心局 (class IV TCO) |
| IT | telenet central office, class | I —类电信网中心局 (class I TCO) |
| telecom., amer. | telephone central office | 市话局 |
| tech. | telephone central office | 中央电话局 |
| telecom., amer. | telephone central office | 电话局 |
| tech. | telephone central office | 电话总局 |
| tech. | The Central Office for International Rail Trans port | 国际铁路运输中心事务所 |
| tech. | The Central Office for International Rail Trans port | 国际铁路运输中央事务局 |
| UN, afr. | UN Peace-building Support Office in the Central African Republic | 中非支助处 = 联合国中非建设和平支助办事处 |
| earth.sc. | Weather Bureau Central Office | 国家气象局中央台美 |
